package jiaran.web.Tomxk.old.practice;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
@WebFilter(urlPatterns = "/Jiaran/*")
public class CoreFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;

        String uri = request.getRequestURI();

        if ("/Jiaran/login.jsp".equals(uri) || uri.endsWith(".css") || uri.endsWith(".png") || uri.endsWith(".jpg")) {
            chain.doFilter(req,resp);
            return;
        }

        HttpSession session = request.getSession();
        Object uid = session.getAttribute("UID");


        if (uid == null) {
            response.sendRedirect("/Jiaran/login.jsp");
            return;
        }
        chain.doFilter(req,resp);

    }

    @Override
    public void destroy() {

    }
}
